1// Copyright JS Foundation and other contributors, http://js.foundation 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15var a = [1, 2, 3, 4]; 16var b = a.slice(0, { valueOf: function(){ a.length = 0; return 100; } }); 17 18assert(b.length === 0); 19 20var c = [1, 2, 3, 4]; 21c.prop = 4 22var d = c.slice(0, { valueOf: function(){ c.length = 0; return 100; } }); 23 24assert(d.length === 0); 25